36

Perimeters of a triangle is: 6.2+8.3+9.5=24cm

But a square and a triangle have equal perimeters

⇒Perimeters of a square is 24cm

So: the side of a square=\(\dfrac{24}{4}\)=6

Other way: the area of a square=a.a

⇔S_square=6*6=36 (cm²)

Choose the correct answer.

1. A wheel is shaped like a ___.

A.circle

B. circular

C. triangle

2. A pizza slice is ___.

A. diamond

B. square

C. triangular

3. A shape with all four sides the same length is ___.

A. a circle

B. a rectangle

C.square

4. A red STOP sign is shaped like ___.

A. an octagon

B. a square

C. a star

5. Most eggs are ___.

A. star

B.oval

C. triangle

6. Rain slides off ___.

A. a rectangular roof

B.triangular roof

C. a square roof

7. An octagon has ___.

A. four sides

B. six sides

C. eight sides

1,B

2,A

3,C

4,A

5,B

6,B

7,B

ý bạn là thế này hả : mà ray là gì vậ bạn???

Đối với XOY góc bên phải, điểm A trên Ox ray, ray Oy.lay điểm B ở điểm E trên chùm tia Ox, điểm F trên các chùm tia Oy biết OE = OB, OF = OA.
a, chứng minh rằng AB = EF và EF vuông AB
b, Gọi M, N lần lượt sai là trung điểm của AB và EF. Chứng minh rằng tam giác vuông trên ....

32/3 nha ban

Vì diện tích hình chữ nhật bằng diện tích hình vuông có cạnh là 35m. Suy ra: Diện tích hình chữ nhật là: 35 x 35 = 1225 (m²)
Chiều dài hình chữ nhật là: 1225 : 24.5 = 50 (m)
Chu vi hình chữ nhật là: (50 + 24.5) x 2 = 149 (m)

1.     Some people are tall, whereas others are________

          a. intelligent               b. thin                       c. short                       d. large

2.     A box is square, whereas_______

          a. a rectangle has four sides                      b. my village has a town square in the centre

          c. we use envelopes for letters                  d. a circle is round

3.     While some parts of the world get an abundance of rain, others________

          a. are warm and humid                              b. are cold and wet

          c. get little or none                                      d. get a lot

4.     In some nations coffee in the favourite beverage, while_________

          a. I like tea                  b. in has caffeine     c. in others it is tea    d. tea has caffeine too

5.     Some people like cream and sugar in their coffee, while_______

          a. others drink hot coffee                           b. others like it black

          c. milk is good in coffee, too                       d. sugar can cause cavities

6.     Jack is an interesting storyteller and conversationalist. His brother, on the other hand, ________

          a. is a newspaper reporter                       

          b. bores other people by talking about himself

          c. has four children

          d. knows a lot of stories, too

7.     I can't ride my bicycle ______ there isn't any air in one of the tires.

          a. despite                    b. because                c. although                 d. but

8.     I got to class on time_______ I had missed by bus.

          a. even though           b. nevertheless        c. because                   d. despite

9.     Brian used to bean  active person, but now he has to limit his activities_______ problem with his health.

          a. nevertheless          b. because of            c. although                 d. in spite of

10.It should be easy for Bod to find more time to spend with his children_______ he no longer has to work in the evenings and on weekends.

          a. even though           b. now that               c. due to                      d. but